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Effects of interleukin-9 blockade on chronic airway inflammation in murine asthma models

Title
Effects of interleukin-9 blockade on chronic airway inflammation in murine asthma models
Authors
Kim M.S.Cho K.-A.Cho Y.J.Woo S.-Y.
Ewha Authors
조영주우소연조경아
SCOPUS Author ID
조영주scopus; 우소연scopus; 조경아scopus
Issue Date
2013
Journal Title
Allergy, Asthma and Immunology Research
ISSN
2092-7355JCR Link
Citation
vol. 5, no. 4, pp. 197 - 206
Indexed
SCIE; SCOPUS; KCI WOS scopus
Abstract
Purpose: Asthma is a chronic inflammatory disease of the airways associated with structural changes and airway remodeling. Interleukin (IL)-9 has pleiotropic effects on both inflammatory cells and airway structural cells, which are involved in asthma pathogenesis. We evaluated the effects of IL-9 blockade on chronic airway inflammation. Methods: Acute airway inflammation was induced in Balb/c mice using aerosolized ovalbumin (OVA), whereas chronic asthma was induced by OVA exposure for 5 weeks with anti-IL-9 or isotype-matched antibody (Ab) treatment during the OVA challenge. Inflammatory cells in bronchoalveolar lavage fluid (BALF) were counted and lung tissues were stained to detect cellular infiltration, mucus deposition, and collagen accumulation. The levels of interferon (IFN), IL-4, IL-5, IL-9, IL-17, and immunoglobulin E (IgE) in BALF were measured using enzyme linked immunosorbent assays, and profiles of inflammatory cells and subsets of T helper (Th) cells were analyzed using flow cytometry. Results: IL-9, IL-17, and IFN- levels were significantly increased in the chronic group compared to the acute asthma group. However, the number of IL- 9-positive cells was not affected, with a decrease in Th17 cells in OVA-challenged caspase-1 knockout mice. Numbers of eosinophils, neutrophils, B cells, mast cells, and Th17 cells decreased after administration of anti-IL-9 Ab. Total IgE, IL-5, IL-9, and IL-17 levels were also lower in the anti-IL-9 group. Conclusions: Our results suggest that anti-IL-9 Ab treatment inhibits pulmonary infiltration of inflammatory cells and cytokine production, especially IL-17. These results provide a basis for the use of an anti-IL-9 Ab to combat IL-17-mediated airway inflammation. ©The Korean Academy of Asthma, Allergy and Clinical Immunology.
DOI
10.4168/aair.2013.5.4.197
Appears in Collections:
의과대학 > 의학과 > Journal papers
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